Brake cable tunnel

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Brake cable tunnel through the top of the transfer tube was an optional extra that I originally offered my custom frames it included a shield-shaped re-enforcing shield, which has cut the tube in the slot.
This thin steel brazed-plate was mainly the decoration of the place, and often chromed, such as this was unnecessary and Structurally.

Later on, when I was little (I) waive the tunnel an extra plate in Fuso.
Had I cut simply slots top tube through the outer cable housing of the thread, then sort of re-enforcement would have been necessary, such as the top tube is significantly weakened cutting slots depending.
I Did the approach does not, because the humidity can enter through the cause corrosion in top tube inside slots. I did my tunnels closed and seal unit itself.

I did this by cutting slots.Then I took a thin steel tube with only the large, enough inner brake cable slide through the contact wire, bent it to curve, then after I brazed in the short piece of music at each end of the first tube larger diameter pipe mittausosuutta hole.

This Assembly was then threaded through the slots and was brazed into place;In the case of a custom frame plate-shaped decorations were added at this time.

Hand held Drill bit and the only slightly larger than standard brake cable housing diameter than the entrance of the tunnel, was drilled off either end of the. for more information about the drawing below.


Finally, the surplus of the tube was cut off and leave the outside of the top tube with the frame of a custom or clean-up of the re-enforcing the plate with the information about the following illustration.


This system with a cable housing within just went from a brake lever in the front end of the tunnel;without cab yarn went through a thin steel tube and a brief other cable housing for the exit of the rear brake went from the rear.

However, It requires some maintenance.Although not humidity enter top tube cable-entry point to collect water than being drained of the outer cable down.
Customers were informed to keep both well greased keep friction, but also in the inner cable housing öljynerotuksessa yarn, of which it has been posted to the top of the pipe to maintain the humidity.

To give even a custom frames with chromium as shown in the following I still advice plenty of grease at the event.

Unfortunately, I have noticed some frames with tunnels, comes from the inside of the top bolt problem creeping bent tube from the outer surface of the hole.

This must be a relatively weak, that has become a structural problem of the way, the tunnel tube is being compiled as described here.

If you have this problem, except if you are designing a complete update; (I) notify the cleaned surface rust down, naked metal, to deal with polar Jelly and touch up paint.

Let the paint dry thoroughly and then plenty of grease, as described above, it's a good idea to also consider using the. some clearly in the entrance to the Silicon sealer. (Used in kitchens and bathrooms sealer type).

Fill in the entrance of the hole at both ends of the Silicon; combining the inner wire finish the whole thing is dry When Silicon, remove the inner wire, öljynerotuksessa thoroughly and replace.

But remember, paints and Silicon does not mix, and the willingness of the silicon and fat, so take the time, and then do one of the one step at a time.  Allow dry and then Allow to dry and ad Silicon grease, the inner wire of the paint.

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